Open AccessGeneration, guiding and splitting of triggered single photons from a resonantly excited quantum dot in a photonic circuit
Author(s) -
Mario Schwartz,
Ulrich Rengstl,
Thomas J. Herzog,
M. K. Paul,
J. Kettler,
Simone Luca Portalupi,
Michael Jetter,
Peter Michler
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.003089
Subject(s) - quantum dot , photonics , physics , laser linewidth , photon , laser , optoelectronics , optics , photonic integrated circuit , waveguide , quantum dot laser , resonance (particle physics) , beam splitter , excitation , semiconductor laser theory , atomic physics , quantum mechanics
We demonstrate resonance fluorescence from single In-GaAs/GaAs quantum dots embedded in a rib waveguide beamsplitter structure operated under pulsed laser excitation. A systematic study on the excitation laser pulse duration depicts that a sufficiently small laser linewidth enables a substantial improved single-photon-to-laser-background ratio inside a waveguide chip. This manifests in the observation of clear Rabi oscillations over two periods of the quantum dot emission as a function of laser excitation power. A photon cross-correlation measurement between the two output arms of an on-chip beamsplitter results in a g(2)(0)=0.18, demonstrating the generation, guiding and splitting of triggered single photons under resonant excitation in an on-chip device. The present results open new perspectives for the implementation of photonic quantum circuits with integrated quantum dots as resonantly-pumped deterministic single-photon sources.